Consider the following system X1+X2+X3=-1 -X1 =-1 X1+X2-X3 =-1 Without solving the system, can you tell if...

Consider the following system X1+X2+X3=-1 -X1 =-1 X1+X2-X3 =-1 Without solving the system, can you tell if...

The machine can stuff a batch of envelopes in 5 hours. How long would it take the machines to stuff 10 batches of envelopes? 14 batches of envelopes? I know one equation...

The choices are ( A + B , B transpose + A transpose , AB(transpose) , AB. I know that A + B and B transpose + A transpose is wrong. My teacher said that AB is the correct answer but...

Suppose that u•(vxw) = 3 , find u•( wxv) . Please give everyone a detailed explanation on how to solve !

x1 + x2 + 2x3 + 2x4 = 0 x1 + 2x2 + x3 + 3x4 = 0 x1 + 3x2 + 4x4 = 0

I have no idea what Im doing wrong but I keep getting the wrong answer. What I did first was find two points. So I set z=0 and x=0 . Then I created two vectors and did the cross product for ABxAC...

I Found an uncommon linear equation from my math book Given : X1 + 4X2 + 9X3 + 16X4 +25X5 + 36X6 +49X7 = 1 4X1 + 9X2 + 16X3 +...

Students are having a fundraiser to help pay for a trip. Selling candy yields a profit of $2.45 while selling a box of pretzels yields a profit of $2.70. The demand for pretzels is at least twice...

Suppose A and B are 4x4 matrices such that detA=-2 and detB=3 , find det [ (A3)det(B-1 ) ] I dont understand how to find det(detB-1) . What is the property for this?

Martha invested a total of $48,000 in two different funds. One fund earned 10.5% interest and the other earned 12% in one year. After that year her account showed $5520 in interest. How much did she...

Geiger had a total of twenty eight $5 and $10 bills. If the total amount of money in his pocket is $180 how many of each bill did he have?

A= [ 2 -1 4 3 ] [ 2 1 0 1 ] [ 3 -4 1 2 ] [ 1 2 3 -1]

ABCT DBAT C= ABT My answer is (CT)-1B-1 BT C-1 (AT)-1 B-1

CT B-1 A2 BAC-1 DA-2 BT C-2 = CT My answer is : D= BA-2 B-1 A-1 CA2 (BT)-1 C2

A= [ 4 a-b 6] [ 2 3 b+c ] [ a-b+c 5 -2] What I dont imderstand is how you get this...

A= [2 -1 4] [ 3 1 -1] [ 4 2 1 ] B= [ 2 -1 4 ] [ 3 1 -1 ] [ 0 4 -7 ] Please explain me the steps. I dont understand what I have to do.

Simplify ( 2AC-1)-1 (AC-1) (AC-1)-1 AD-1 First off, Im not even sure what the topic of this question is. In my book , it just " simplify" so im having a hard time finding...

(2AT + 3T)-1 = [-4 3 ] [ 1 -1 ] Please show me steps. I dont understand how to undo the...

x+y+z=1 2x+2y+2z=2 x+y+z=0 Im not sure if its infinite or no solution

Let A be any mxn matrix and let 0 be the mxn matrix each of whose entries is zero . Show that if kA=0 , then k=0 or A=0. I am very lost ! Please help me show this because I think...